Looks amazing!!
There is two things I noticed about this sig, that seem ... odd. There is, to the left of Cena, your blue smoke effect that seems to cut off abruptly, like it was the end of the brush or something?
The other thing is, I dont like the ... lens flare? you used very lightly that goes off past Cena's head to the left hand side.
This is brilliant work, but me being pedantic just needs to point those out, lol. Amazing none the less!